Multi-wall bulk pak shipping container



Dec. 24, 1963 E. F. REPKING 3,115,292

MULTI-WALL BULK PAK SHIPPING CONTAINER Original Filed Sept. 15, 1958' 4Sheets-Sheet 1 07/54 70? EDW/MJ r7 K /mm p172 zwsr Dec. 24, 1963 E. F.REPKING 3,115,292

MULTI-WALL BULK PAK SHIPPING CONTAINER Original Filed Sept. 15, 1958 4Sheets-Sheet 2 Dec. 24, 1963 F. REPKING MUL'II-WALL BULK PAK SHIPPINGCONTAINER Original Filed Sept. 15, 1958 4 Sheets-Sheet 3 Dec. 24, 1963 4Sheets-Sheet 4 FIGJE) United States Patent ()fitice 3,115,292 PatentedDec. 24, 1963 3,115,292 MULTi-WALL BULK PAK SHIPPING CDNTER Edward F.Replring, Glasgow, Mm, assignor to Crown Zclierbaeh Corporation, anFrancisco, Calif., a corporation of Nevada Original application Sept.15, 1958, Ser. No. 761,263 now Patent No. 3,041,942, dated July 3, 1962.Divided and this application Jan. 23, 1962, er. No. 163,115

Qlaims. (Cl. 229-45) This application is a division of co-pendingapplication Serial No. 761,263, filed September 15, 1958, now Patent No.3,041,942 granted July 3, 196-2, which application contained subjectmatter common to the application Serial No. 682,027, filed September 4,1957, now abandoned.

The invention relates to an improvement in multi-wall containers suchas, for example, large drum-like containers constructed of paperboard orother suitable bendable material, for packaging bulk commodities whichis simple in construction, economical in material, particularly easy toassemble, has means located wholly within the container forautomatically and permanently locking the cover members in place,requiring no special tools or other extrinsic devices for application,the container providing a substantial improvement in compressive andother strength properties.

The means for permanently locking the top and bottom closures to thebody member of the container comprises the joint cooperation of threeessentials of the container namely, (1) inwardly folded flaps integralwith the top and bottom edges of the outer sleeve, (2) reversely foldedlooking flaps fixed to the outer face of flanges hinged to side edges ofthe top and bottom closure panels, in the folded position conforming tothe contour of the inner face of the outer sleeve, positioned betweenthe top and bottom end margins of the body member sleeves and (3) thelength of the inner sleeve fixed to correspond to the critical distancebetween the inner faces of the end closure panels when they areseparated by the maximum distance that just effects automatic end to endabutting engagement of the outer sleeve fiaps (1 above) with the lockingflaps (2 above) of the cover flanges, whereby the end edges (3 above) ofthe inner sleeve abut the inner faces of the cover panels and maintainthe cover members permanently locked in fixed relation to the bodymember sleeves.

The distance between the free end edges of the top and bottom closureflange locking flaps and the fold at the end edges of the outer sleeveis very slightly greater than the length of the outer sleeve inturnedflaps to permit the said free end edges of the closure flange lookingflaps to snap into abutment with the free end edges of the outer sleeveflaps with the inner faces of the closure panels abutting the end edgesof the inner sleeve.

The containers may be square, hexagonal, octagonal, etc. in shape. Thehexagonal form is generally preferred.

Typical dimensions of the drums for packaging 200 to 400 pounds ofmaterial are: 30 gal. capacity, 17 inches between opposed wall panelscommonly denoted as 17 x 17", 28 inches in height; 60 gal. capacity, x20 inches, 41 inches in height, etc.

The container of the invention embodies many practical advantages, itmay be assembled easily and rapidly :by a sing-1e operator without theuse of tools or other extrinsic devices. The entire exterior surface ofthe container is free from all outward projections, thereby conservingstorage space and providing maximum printing area. It has a high topload rating as well as other desirable strength properties, strapping isnot required, the seal between the covers and sleeves is sift proof. Theconstruction is pilfer proof since access to the interior isunobtainable without obvious mutilation of the container, The saving incost of the drum over presently available drums of comparable quality,reliability and function is substantial. The outward thrust of flowablebulk contents such as materials in powder, granular or pellet form andother materials tend to hold the locking means even more securelytogether.

An object of the invention is to provide a container having a bodymember of telescoped inner and outer open ended sleeves with closuremembers permanently locked to the body member by means located entirelywithin the container.

Another object of the invention is to provide generally a sift proof,pilfer proof multi-panel container comprising inner and outer telescopedsleeves with cover panels conforming in contour to a horizontal crosssection through the inner faces of the outer sleeve. The cover panelsare permanently locked to the outer sleeve with their outer faces insubstantially the plane of the folds at the ends of the outer sleeve byautomatic locking engagement of flaps located between the top and bottommargins of the sleeves, with the inner faces of the cover pane-ls inabutment with the respective top and bottom edges of the inner sleeves.

Still another object is to provide a container having a body of openended telescoped sleeves with closure members immobilized in permanentlyfixed locked relation to each other and to said sleeves by the jointcombination of (l) inwardly folded flaps hinged to the top and bottomends of the outer sleeve, (2) reversely folded locking flaps fixed tothe outer face of inwardly folded flanges hinged to the side edges ofthe closure panels and (3) the length of the inner sleeve fixed tocorrespond to the critical distance between the inner faces of theclosure panels when they are separated by the maximum distance that justpermits automatic end to end abutment of the said outer sleeve fiapswith the said cover panel flange locking flaps, whereby the end edges ofthe inner sleeve abut the inner faces of the cover panels and maintainthe closure members permanently locked in fixed relation to the bodymember.

Another object is to provide a method for assembling the blanks forforming a container body member having telescoped inner and outer openended sleeves and closure members permanently secured to the bodymember. The method comprises assembling the bottom closure member andtelescoping the outer sleeve thereover, collapsing the inner sleeveinwardly and inserting it within the outer sleeve until its bottom edgesare in abutment with the inner face of the bottom closure panel. Thenrestoring the inner sleeve to its normal polygonal shape and insertingthe top closure member flanges and locking flaps between the inner andouter sleeves until said locking flaps snap into end to end abutment,with the inner faces of the closure panels in abutment with the endedges of the inner sleeve.

The invention also consists in the parts, arrangement and combination ofparts hereinafter described and claimed and the accompanying drawingsform a part of this specification and like numerals and symbols thereinappearing refer to like parts wherever they occur.

In the drawings:

FIGURE 1 is a plan view of the blanks of the component parts of thecontainer;

FIGURE 2 is a perspective view of the assembled outer sleeve blank Awith integral top and bottom end flaps turned inwardly;

FIGURE 3 is perspective view of the inner and outer telescoped sleeveswith a bottom pad in place;

FIGURE 4 is a perspective view of the assembled inner and outer sleeveswith the bottom closure partially inserted within end margins of thesleeves, with reinforcing pads in place and a portion cut away toillustrate the relation of parts and with the assembled top closurepreparatory to insertion within the end margins of the containerssleeves;

FIGURE 5 is a perspective view of the fully assembled container;

FIGURE 6 is a vertical section of the assembled container with an endclosure member in process of insertion between the sleeves with pad inplace;

FIGURE 7 is an enlarged vertical sectional view taken in the directionof arrows 77 of FIGURE 5 illustrating the relation of parts in an endclosure of the completely assembled container;

FIGURE 8 is a plan view of the blank of the outer sleeve of a modifiedform of the container showing the reinforcing tape and tear tape;

FIGURE 9 is a vertical section of the blank of FIG- URE 8 taken in thedirection of the arrows 9;

FIGURE 10 is a vertical section of the blank of FIG- URE 8 taken in thedirection of the arrows 10-10;

FIGURE 11 is a perspective view of the partially assembled blank ofFIGURE 8;

FIGURE 12 is a horizontal section of FIGURE 11 partially taken throughthe folded top infolded locking flaps;

FIGURE 13 is a plan view of the blank of one of the closure members ofthe container;

FIGURE 14 is a perspective view of the fully assembled blank of FIGURE13;

FIGURE 15 is a perspective view of the assembled outer sleeve and bottomclosure blank with a portion broken away to illustrate the position ofthe bottom closure flanges and flaps;

FIGURE 16 is a perspective view showing the inner sleeve inwardlycollapsed prior to insertion within the outer sleeve, the dotted lineindicating the normal position of the inner sleeve;

FIGURE 17 is an enlarged fragmentary elevation of the bottom portion ofthe assembled outer sleeve and bottom closure members with a portion cutaway, showing the bottom ends of the collapsed inner sleeve in abuttingrelation to the end closure panel;

FIGURE 18 is a perspective view of the partially assembled containerwith the inner sleeve in normal position and the dotted lines indicatingthe partially collapsed condition which allowed insertion within theouter sleeve;

FIGURE 19 is a section of the container fully loaded and prior toinsertion of top closure member, taken in the direction of the arrows1919 of FIGURE 18;

FIGURE 20 is a vertical section of the container of FIGURE 19 showingthe top member in process of insertion into locking position;

FIGURE 21 is a vertical section of an upper corner of the fullyassembled container showing a pad inserted between the closure panel andthe end of the inner sleeve with a crushed portion of the pad resting onthe top edge of the inner sleeve.

In the blank A, FIGURE 1, of the outer sleeve, trans- Verse scores 11and longitudinal scores 12 define wall panels It and hinge lines of topand bottom flaps 13 and 14 separated at least in part at their sideedges by slots 15, said flaps having free end edges 17. A securing flap16 which is coextensive in length and attached to the outer edges of theouter panel 143 is also defined by score 11.

The blank B for forming the inner sleeve is scored transversely at 21 todefine the side walls 26 and securing flap 22, coextensive in lengththerewith.

The closure blanks C are scored at 26 to define the closure panel withside edges corresponding in number and essentially coextensive in widthwith the width of the panels of sleeves A and B. This score also definesthe hinge lines of flanges 27 which have locking flaps 29 hinged totheir outer end edges defined by scores 28, said locking flaps have freeend edges 36). Pad D consists of flat sheet 35 corresponding in contourto the panels 25 of the cover members. The use of this pad is optionalbut may be employed to advantage in packaging relatively largequantities of heavy material. The margins of the pad are normallycrushed to facilitate sift proof closures of the container.

FIGURE 2 is a perspective view of the erected outer sleeve A withsealing flap 16 attached to the opposite remote panel 10 by staples,glue or other suitable means. The top and bottom outer sleeve flaps l3and 14 respectively are folded inwardly adjacent the upper and lowerinner margins of the outer sleeve.

The perspective view of FIGURE 3 illustrates the container with a bottompad 35 inserted in the bottom of the container and the inner sleeve Btelescoped within the outer sleeve A and with the outer top and bottomflaps 13 and 14 respectively juxtaposed between the upper and lowermargins of the sleeves. The top pad 35 is here shown ready to beinserted over the top edges 23 of the inner sleeve B.

The perspective view of FIGURE 4 shows a further step of the assemblywherein the top pad 35 is inserted within the outer sleeve turned downflaps 13 and resting on the top end edges 23 of the inner sleeve. Thisfigure also shows the bottom closure member C partially in place and thetop closure member C fully assembled ready to insert the cover flanges27 between the outer sleeve flaps 13 and the inner sleeve until the toppanel 25 rests on the pad 35 and the free end edges of the flange flaps29 are snapped into abutting relation with the free end edges 17 of theouter sleeve turned down flaps 13. The completely assembled container isshown in the perspective View, FIGURE 5.

The vertical sectional view of FIGURE 6 shows the flanges 27 and flaps29 in the process of insertion between the flaps 13 of the outer sleeve10 and the inner sleeve side walls 20.

The cover member in place is shown in the vertical sectional view ofFIGURE 7, the outer face of the panel 25 being in substantially theplane of the top folds 40 of the outer sleeve with its unclerfaceresting on the top pad and the free end edges 17 of the flaps 13abutting free end edges 30 of the reversely folded flange flaps 29 ofthe cover member.

The distance between the cover panel 25 and the pad 35 of the sectionalview FIGURE 7, is exaggerated to clearly distinguish these members fromeach other; actually the panel 25 is in flatwise contact with the pad35, when the pad is employed, or in the absence of the pad it will be incontact with the upper edges 23 of the inner sleeve.

The container may be assembled in any convenient manner. A preferredmethod is to fold panels 10 of the blank A carrying the securing strip16 over the other panels and securing the strip 16 to the outer verticalmargin of the remote panel 10. The panels 20 of blank B are similarlyfolded and attached together in the same manner as described for theouter sleeve A.

The outer sleeve A is next opened into tubular form and the top andbottom flaps 13 and 14 respectively folded inwardly as shown in FIGURES2 and 3, forming the broad top and bottom folds 40. The inner sleeve 13is then inserted within the outer sleeve A as shown in FIGURE 3, theflaps 13 and 14 being positioned between the upper and lower margins ofthe telescoped sleeves.

The cover members C may be assembled by folding the locking flaps 29reversely about the scores 28 into flatwise engagement with the outerface of flanges 27. The flanges are then folded downwardly toapproximately the position shown in FIGURE 4.

It should be noted from FIGURE 7 that the distance between the flap fold40 of the outer sleeve A and the free upturned edges 30 of the lockingflaps 29 is slightly greater than the length of the body flaps 13 fromthe top fold 41) to the downturned free end edges 17 so that the endedges 36 of flaps 29 automatically fall into aligned abutting relationwith the downturned free end edges 17 of the outer sleeve flaps 13 whenthe cover flanges 27 are inserted between the upper margins of thesleeves A and B. At this point the cover panels 25 will be within theupper and lower margins of the outer sleeve inwardly folded flaps 13 and14 respectively with cover panel 25 inner faces resting on or engagingthe upper and lower end edges 23 of the inner sleeve B, or the edges 23engaging the adjacent marginal portions of the pad 35 and thusprecluding further inward movement of the cover panels 25 fromsubstantially the plane of the top and bottom folds 40 of the outersleeve A.

The length of the cover panel flanges 27 and their reversely foldedlocking flaps 29 and the length of the outer sleeve flaps 13 may bevaried if desired, contingent upon maintaining the hereinbeforedescribed distance relations. For example, in a relatively largecontainer for packing large quantities of a relatively heavy material,it may be desirable to have the outer sleeve flap 13 four inches (4") ormore in length with a corresponding adjustment of the length of thecover flanges 27 to meet the aforesaid required distance relationbetween the locking end edges 17 and 30 of the respective flaps 13 and29. Conversely, the length of the outer sleeve flaps 13 may be reducedto one and one-half inches 1 /2") for example, for packing smallerquantities of material.

A modified form of the invention is illustrated in FIG- URES 8 to 21inclusive.

A plan view of the blank which forms the outer sleeve of the modifiedform is shown at 50, FIGURE 8. The

longitudinal scores 51 and 5:2 define the end edges of the body panels56 and the hinge lines of the top flaps 57, 58, 59, 60, 61 and 62 andthe hinge lines of bottom flaps 65, 66, 67, 68, 69 and 70. Thetransverse scores 53 define the hinge lines connecting the panels 56 andthe glue flap 55. Top flaps 58 and 59 are separated on their side edgesby slot 63 and flaps 6t) and 61 by slot 64 while the bottom flaps 66 and67 are separated by slot 71, and 68 and 69 by slot 72. A portion of theouter liner 76 of the blank is broken away to show the direction of theflutes 73 of the corrugated medium and the position of a reinforcingband 74 extending longitudinally between the corrugated medium and theouter liner 76. The blank is also cut away to show a longitudinal tearstrip 75 positioned on the inner face of the inner liner as indicatedmore clearly in FIGURE 9.

A longitudinal sectional view of the blank of FIGURE 8 is shown inFIGURE 9 taken in the direction of the arrows 99, the tear strip 75being on the outer face of the inner liner 77. FIGURE is also alongitudinal sectional view of the blank of FIGURE 8 taken in thedirection of the arrows 19-10 showing the reinforcing band 74 positionedbetween the outer liner 76 and the cormgated medium 73.

The inner sleeve blank of the modified form of the invention issubstantially the same as the blank B of FIG- URE 1 which istransversely scored at 21 to define side walls 20 and the securing flap22.

A perspective view of the outer sleeve assembled into polygonal formfrom the blank of FIGURE 8 is illustrated in FIGURE 11, the remotepanels 56 being secured together by the glue flap 55 and the top flaps57 to 62 inclusive folded inwardly and downwardly adjacent the innerface of the outer sleeve side walls. The drawing also shows the initialposition of these top flaps before folding by dotted lines and also thetear strip on the inner face of the inner liner encircling the containerat an appreciable distance below the free end edges of the inner sleeve.This drawing also shows the inwardly folded bottom flaps 65 to 74inclusive by dotted lines.

It will be noted that the flaps 58 and 59 separated by slot 63 and flap69 and 61 by slot 64, with the side edges of the flaps within each pairhinged together, may be readily folded downwardly against the inner faceof the body walls of the container and become automatically locked inthis position when the sleeve is in tubular form without the use ofstaples, glue or other securing means. The same process of locking theflaps in position applies to the bottom flaps 65 to 76* inclusive.FIGURE 12 is a partial horizontal section through the folded outersleeve flaps of the container of FIGURE 11 showing the locked flapsenclosing the reinforcing band 74.

FIGURE 13 shows a plan view of the blanks 78 for forming the top andbottom closures. The cover panel 79 which corresponds in contour to ahorizontal section of the inner face of the outer sleeve of thecontainer is defined by scores 79:: which are also the hinge lines ofcover flanges St The outer edges of the flanges are defined by thescores 80a which are also the hinge lines of locking flaps '81. Thecover flanges are separated on their side edges by slots 82.

The top and bottom closure members are assembled by reversely foldingthe locking flaps 81 in flatwise relation to the outer face of theflanges 80 and then folding the flanges substantially right angularlyinwardly with respect to the inner face of the closure panel 79. FIG-URE 14 is a perspective view of the top and bottom closures assembled asdescribed. The reversely folded locking flaps 81 may be secured to theouter face 80 of the cover panel flanges by staples 93 as indicated, orby glue or other suitable means.

FIGURE 15 is a perspective view illustrating the first step ofassembling the container proper. The outer sleeve 50 with its unfoldedbottom flaps 65 to 70 inclusive is telescoped over the bottom closure(assembled as in FIG- URE 14) until the free end edges 69 of theinfolded bottom flaps 65 to 70 inclusive snap into end to end abutmentwith the free end edges of the bottom closure locking flaps 81. Aportion of the lower part of FIG- URE 15 is broken away to clearlyillustrate the relation of parts at this stage of the assembly.

The first stage of the operation of telescoping the inner sleeve 83within the outer sleeve 50 is shown in the perspective view FIGURE 16,wherein a pair of connected together side panels 84 of the inner sleeve33 are inwardly collapsed which permits the sleeve to be readilypositioned with its bottom end edges 85 in abutment with the bottomclosure panel 79 and at least one of its wall panels 84 in flatwiserelation to the inner face of the closure flanges 89. FIGURE 17 is asomewhat enlarged fragmentary elevation of the lower portion of thecontainer with the inner sleeve collapsed and in position as described.The full length perspective view of FIGURE 18 of the container shows theinner sleeve restored to its normal hexagonal position with all of itspanels in closely parallel relation to the corresponding panels of theouter sleeve and the lower margins of all of its wall panels in flatwisecontact with the inner face of closure panel flanges 80.

After the inner sleeve has been restored to its normal form within theouter sleeve, the container is loaded with flowable contents or othermaterials as indicated in the vertical sectional view of FIGURE 19. Theloaded container is now ready for the application of the top closure.The process of inserting the top closure is shown in the verticalsection FIGURE 20, wherein the flanges 80 of the cover panels 79 withtheir reversely folded upturned locking flaps 81 are being insertedbetween the top margins of the inner sleeve panels 84 and the inturnedflaps 57 to 62 inclusive of the outer sleeve 54]. In the final positionof the closures, the underface of the top and bottom cover panels 79abut the top and bottom edges 85 respectively of the inner sleeve andthe free end edges of the locking flaps 81 are in end to end abutmentwith the free end edges of the inturned outer sleeve flaps 57 to 62inclusive, permanently immobilizing all parts of the container in fixedrelation to each other. The upper marginal portion of the inner sleeve33 is also in firm, fixed, gripping engagement or contact with the innerfaces of the closure panel flanges 8d whereby relative movement betweenthe inner and outer sleeve is prevented.

When top and bottom pads 35a are employed, the collapsed or crushed sidemargins of the pads will be interposed between the end edges of theinner sleeve panels 85 and the interface of the closure panels 7 9 asillustrated in the vertical sectional view FIGURE 21, forming asubstantially incompressible closure of the panel 7% and the top edgesof the inner sleeve panels 85.

The loaded container described is p ilfer proof as well as sift proof.All parts of the container are permanently locked in fixed position,consequently access tothe interior thereof is precluded without visualevidence of tampering or mutilation. The reinforcing band 74, positionedin close proximity to the top flap hinge line 51 of the outer sleevewall panels, effectually prevents tearing or disruption of the packageif and when the loaded container is carelessly dropped on a corner, forexample in the course of handling and transportation. if desired areinforcing band may be similarly placed in close proximity to thebottom hinge line 52 of the outer sleeve wall panels. For convenience atthe point of use the tear strip 75 (shown in process of operation,FIGURE 18) permits the upper portion of the outer sleeve with attachedclosure member to be lifted from its telescoping relation with the innersleeve for access to the contents and forms a replaceable covertelescoping the upper margin of the inner sleeve.

The permanent locking of all parts of the loaded container in fixedposition permits the container to be handled on its side, upturned or inany other position without danger of damage or loss of contents.

It is understood that the particular embodiment of the inventiondescribed is illustrative and not restrictive. The invention may besusceptible of embodiment in other modified forms. All modificationswhich are similar or equivalent hereto come equally within the scope ofthe claims next appearing.

I claim:

l1. A locked end drum-like shipping container free from externalstrapping and formed from foldable sheet material and comprisingtelescoped inner and outer open ended sleeves and identical end closuresdisposed in locked engagement with each end of the sleeves, the sleevesand the end closures being immobilized in fixed relation to each otheronly by integral cooperating means associated with the outer sleeve andend closures and disposed wholly internally of the sleeves of thecontainer, the outer sleeve including a series of Wall panels infoldably connected tubular relation and securing end flaps foldablyconnected to both ends of each wall panel and substantially coterminousin width therewith, the securing flaps infolded in flatwise contactingrelation to the inner surfaces of the respective wall panels of theouter sleeve with the free terminal end edges thereof directed towardsthe opposite ends of the container, the inner sleeve having end edgesand corresponding in configuration to the outer sleeve with end portionsthereof disposed interiorly and in parallel relation to the outer sleevesecuring flaps, the end closures each having a closure panel with sideedges defined by score lines and conforming to the ends of the outertubular sleeve interiorly of the infolded securing flaps of the outertubular sleeve, said closure panels each including a plurality offlanges hinged :to the side edges thereof and substantially coextensivein width therewith and disposed between and in flatwise contactingrelation to the outer sleeve securing flaps and end portions of theinner sleeve, the closure panel flanges having end edges determined by afold line opposite the hinge connection to the closure panel with saidend edges disposed inwardly of the outer sleeve securing flap free endedges, locking flaps hingedly connected by the fold line to the endedges of the closure panel flanges and secured in flatwise relation tothe outer surface of the ends of the closure flanges, said locking flapshaving free end edges aligned and in edgewise abutting relation to theouter sleeve securing flaps free end edges and immobilizing the endclosures from movement outwardly of the ends of the container, the innerend edges of the closure flanges being diminished in width to permitinsertion between the outer sleeve securing flaps and inner sleeve, theinner sleeve end edges each being in abutting relation to the inner faceof the respective closure panel thereby immobilizing the end closuresfrom movement inwardly of the container.

2.A drum-like shipping container formed from foldable sheet material andcomprising telescoped inner and outer open ended sleeves and endclosures in locked engagement with each end of the sleeves, the sleevesand the end closures immobilized in fixed relation to each other only bymeans disposed wholly internally of the container, the outer sleeveincluding a series of wall panels in foldably connected tubular relationand securing flaps foldably connected to the ends of each of the wallpanels and substantially cotermin'ous in width therewith, the securingflaps infolded in fiat-wise relation to the inner margins of therespective wall panels with free end edges thereof directed towards theopposite ends of the container, the inner sleeve corresponding inconfiguration to the outer sleeve and having end edges, the end closureseach having a closure panel with side edges conforming to the ends ofthe outer sleeve interiorly of the infolded securing flaps, said closurepanels each being provided with flanges having hinge connections to theside edges thereof and substantially coextensive in width therewith anddisposed between and in flatwise contacting relations to the outersleeve securing flaps and end portions of the inner sleeve, the closurepanel flanges having inner end edges opposite the hinge connection tothe closure panel with said inner edges disposed inwardly of the outersleeve securing flap free end edges, locking flaps secured in fiatwiserelation to the outer surface of the ends of the closure flanges, saidlocking flaps having free end edges aligned and in edgewise abuttingrelation to the outer sleeve securing flaps free end edges immobilizingboth the end closures from movement outwardly of the ends of thecontainer, the inner end edges of the closure flanges being diminishedin width to permit insertion between the outer sleeve securing flaps andinner sleeve, the inner sleeve end edges each being in abutting relationto the inner face of the respective closure panel thereby immobilizingthe end closures from movement inwardly of the container.

3. The container as set forth and claimed in claim 2 wherein a closurepanel is reinforced by a flat sheet, the sheet corresponding in contourto the closure panel and disposed in flatwise relation against the innersurface thereof, the end margins of the sheet intervening between theclosure panel and the end of the inner sleeve and in contacting relationtherewith.

4. The container set forth and claimed in claim 2 including means foropening the container comprising a 3,1 1 5,292 9 manually separableportion of the outer sleeve in spaced adjacency to one end thereofadapted to completely sever said sleeve to provide a telescoping coverincluding the 2 347 417 Kraft Apr 25 d closure 2,371,630 Liebmann Mar.20, 'lhe contalner set forth and clauned 1n clann 2 5 2,794,588 Georgeetal June 4,

wherein at least one ad acent pair of outer sleeve securing 2 808 190Buhrmaster et a1 Oct 1 flaps are separated on their side edges by a slotand at u least one adjacent pair have side edges determined by a FOREIGNPATENTS hinge connection. 755,743 Great Britain Aug. 29,

References Cited in the file of this patent UNITED STATES PATENTS

1. A LOCKED END DRUM-LIKE SHIPPING CONTAINER FREE FROM EXTERNALSTRAPPING AND FORMED FROM FOLDABLE SHEET MATERIAL AND COMPRISINGTELESCOPED INNER AND OUTER OPEN ENDED SLEEVES AND IDENTICAL END CLOSURESDISPOSED IN LOCKED ENGAGEMENT WITH EACH END OF THE SLEEVES, THE SLEEVESAND THE END CLOSURES BEING IMMOBILIZED IN FIXED RELATION TO EACH OTHERONLY BY INTEGRAL COOPERATING MEANS ASSOCIATED WITH THE OUTER SLEEVE ANDEND CLOSURES AND DISPOSED WHOLLY INTERNALLY OF THE SLEEVES OF THECONTAINER, THE OUTER SLEEVE INCLUDING A SERIES OF WALL PANELS INFOLDABLY CONNECTED TUBULAR RELATION AND SECURING END FLAPS FOLDABLYCONNECTED TO BOTH ENDS OF EACH WALL PANEL AND SUBSTANTIALLY COTERMINOUSIN WIDTH THEREWITH, THE SECURING FLAPS INFOLDED IN FLATWISE CONTACTINGRELATION TO THE INNER SURFACES OF THE RESPECTIVE WALL PANELS OF THEOUTER SLEEVE WITH THE FREE TERMINAL END EDGES THEREOF DIRECTED TOWARDSTHE OPPOSITE ENDS OF THE CONTAINER, THE INNER SLEEVE HAVING END EDGESAND CORRESPONDING IN CONFIGURATION TO THE OUTER SLEEVE WITH END PORTIONSTHEREOF DISPOSED INTERIORLY AND IN PARALLEL RELATION TO THE OUTER SLEEVESECURING FLAPS, THE END CLOSURES EACH HAVING A CLOSURE PANEL WITH SIDEEDGES DEFINED BY SCORE LINES AND CONFORMING TO THE ENDS OF THE OUTERTUBULAR SLEEVE INTERIORLY OF THE INFOLDED SECURING FLAPS OF THE OUTERTUBULAR SLEEVE, SAID CLOSURE PANELS EACH INCLUDING A PLURALITY OFFLANGES HINGED TO THE SIDE EDGES THEREOF AND SUBSTANTIALLY COEXTENSIVEIN WIDTH THEREWITH AND DISPOSED BETWEEN AND IN FLATWISE CONTACTINGRELATION TO THE OUTER SLEEVE SECURING FLAPS AND END PORTIONS OF THEINNER SLEEVE, THE CLOSURE PANEL FLANGES HAVING END EDGES DETERMINED BY AFOLD LINE OPPOSITE THE HINGE CONNECTION TO THE CLOSURE PANEL WITH SAIDEND EDGES DISPOSED INWARDLY OF THE OUTER SLEEVE SECURING FLAP FREE ENDEDGES LOCKING FLAPS HINGEDLY CONNECTED BY THE FOLD LINE TO THE END EDGESOF THE CLOSURE PANEL FLANGES AND SECURED IN FLATWISE RELATION TO THEOUTER SURFACE OF THE ENDS OF THE CLOSURE FLANGES, SAID LOCKING FLAPSHAVING FREE END EDGES ALIGNED AND IN EDGEWISE ABUTTING RELATION TO THEOUTER SLEEVE SECURING FLAPS FREE END EDGES AND IMMOBILIZING THE ENDCLOSURE FROM MOVEMENT OUTWARDLY OF THE ENDS OF THE CONTAINER, THE INNEREND EDGES OF THE CLOSURE FLANGES BEING DIMINISHED IN WIDTH TO PERMITINSERTION BETWEEN THE OUTER SLEEVE SECURING FLAPS AND INNER SLEEVE, THEINNER SLEEVE END EDGES EACH BEING IN ABUTTING RELATION TO THE INNER FACEOF THE RESPECTIVE CLOSURE PANEL THEREBY IMMOBILIZING THE END CLOSURESFROM MOVEMENT INWARDLY OF THE CONTAINER.